PLZ ANSWER SOON What did J. J. Thomson’s experiments with cathode-ray tubes imply about the mass of an electron? -Electrons are many thousand times larger than the nucleus and negatively charged.
-Electrons are many thousand times smaller than the nucleus and positively charged.
-Electrons are many thousand times smaller than the nucleus and negatively charged.
-Electrons are many thousand times larger than the nucleus and possess no charge.

Why can't you grow plants with adhesion water?

Which of the following typically characterizes a tropical rainforests

Assume that you are interested in separating short (200-400 bp) dna molecules from a pool of longer molecules in the 10,000-20,000 nucleotide range. you have two recipes for making your polyacrylamide gels: one recipe uses 1.5 percent agarose and would be considered a “hard gel,” while the other uses 0.5 percent agarose and would be considered a loose gel. which gel should you use to separate the short (200-400 bp) dna molecules from a pool of longer molecules in the 10,000-20,000 nucleotide range?